The real shame with this is that the community have largely rolled over and accepted the case put by the CAA around its funding model and their assertion that suddenly their spreadsheet was so far out previously that charges have now sharply increased.
However that really could be countered by a view that it's less a case of a prior under payment but rather a payment for a service that actually wasn't delivered at all, wasn't delivered to the level expected or required. In any other business the executive wouldn't get a bonus and you'd get a refund and in some cases compensation.